2440645981 has 8 divisors (see below), whose sum is σ = 2463560064. Its totient is φ = 2417755200.

The previous prime is 2440645957. The next prime is 2440645997. The reversal of 2440645981 is 1895460442.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2440645981 - 2⁷ = 2440645853 is a prime.

It is a super-2 number, since 2×2440645981² = 11913505609142904722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2440645951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261070 + ... + 270256.

It is an arithmetic number, because the mean of its divisors is an integer number (307945008).

Almost surely, 2^2440645981 is an apocalyptic number.

It is an amenable number.

2440645981 is a deficient number, since it is larger than the sum of its proper divisors (22914083).

2440645981 is a wasteful number, since it uses less digits than its factorization.

2440645981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11651.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 2440645981 is about 49402.8944597379. The cubic root of 2440645981 is about 1346.3818950334.

The spelling of 2440645981 in words is "two billion, four hundred forty million, six hundred forty-five thousand, nine hundred eighty-one".